Effect of Oxidizing Agent on the Ionic Conductivity of Polypyridine- Poly (Vinyl Acetate) Composite Films

Authors

  • A. V. Kohale  Department of Physics, Shri R. R. Lahoti Science College, Morshi, India

Keywords:

PPY-PVAc composite, Chemical oxidative polymerization, XRD, dc conductivity

Abstract

An attempt has been made to investigate the effect of temperature and concentration of ferric chloride (FeCl3) oxidant on the conductivity of polypyridine (PPY)-poly (vinyl acetate) (PVAc) composite films and to study the structure of these films. Polypyridine (PPY) and poly vinyl acetate (PVAc) composite films were synthesized by chemical oxidative polymerization method with the solution of ferric chloride (FeCl3) oxidant in methanol at room temperature. Their dc conductivity as a function of temperature (308-353 K) was measured. At the room temperature (308 K), the dc electrical conductivity of the films initially increases with concentration of FeCl3 and becomes maximum (σ = 1.57 x 10-11 S/cm) at 25 wt % of FeCl3, which indicates percolation behaviour. This increase in conductivity is due to increase in strength of oxidizing agent, which increases the rate of polymerization. However, further increase in concentration of FeCl3, decreases the conductivity of the films due to reduced segmental motion of polymer. V-I characteristics of the films were linear, indicates the ohmic nature. The temperature dependence of conductivity shows Arrhenius behaviour. The composite films have been characterized by X-ray diffraction. The XRD spectra of the films reveal a broad hump in low 2θ region typical of short range order indicating that these films are amorphous.

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International Journal of Scientific Research in Science and Technology

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Published

2017-01-30

Issue

Volume 3, Issue 1, January-February-2017

Section

Research Articles

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How to Cite

[1]
A. V. Kohale, " Effect of Oxidizing Agent on the Ionic Conductivity of Polypyridine- Poly (Vinyl Acetate) Composite Films, International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011, Volume 3, Issue 1, pp.850-854, January-February-2017.